KR20100008608U - Cooking device - Google Patents

Abstract

The present invention is to obtain a heating cooker of the assembly configuration that can suppress the enlargement of the size in the heating oven formed by adopting a non-flat surface-shaped peripheral wall portion projecting outward to a portion of the inner circumferential wall surface, the parts can be common. In the structure which has the circular arc part 33 which protrudes outward from the upper wall part 22a out of the circumferential wall part formed in box shape, and forms a non-flat surface shape, the junction part 34 is formed in the both side ends of the said upper wall part 22a. In addition, the plate-shaped left and right side wall portions 22c and 22d positioned at both sides of the upper wall portion 22a form a flange portion 31 to which the joining portion 34 is polymerized, and the upper wall portion 22a. It characterized in that it has a configuration having a stepped portion 35 formed bent toward the inner side from the junction 34.

Description

Heated Cooker {COOKING DEVICE}

The present invention relates to a heating cooker that improves the assembly configuration of the heating oven for heating food.

BACKGROUND ART Conventionally, heating cookers in which oven heating by hot air, radiant heating by a heater, high frequency heating by a magnetron, and the like are suitably employed as heating means for heating and cooking food housed in a heating oven have been widely used in general homes.

By the way, even in the cooking apparatus employ | adopted alone or used together with the said heating means, the structure of the heating chamber encloses the circumferential wall part except the front wall part which has an opening part of the front surface by the metal plate which forms a flat surface shape. It is set as the structure formed in the rectangular box shape.

Since such a heating chamber cannot form the whole circumferential wall surface integrally, for example, peripheral wall components, such as an upper wall part, a side wall part, a bottom wall part, and a rear wall part which form a heating furnace except a front wall part, are prepared, and these adjacent wall parts They are joined together to form a rectangular box-shaped heater, and as the joining means, they are usually assembled by means of bending, caulking, welding, or the like (for example, Japanese Patent Application Laid-Open No. 2000-227227 and Japanese Laid-Open Patent Publication). See Publication No. 5-272760).

As described above, in the case where the circumferential wall portion forming the heater forms a flat surface shape when forming the rectangular heater, the adjacent walls are joined without problems, for example, when the upper wall portion and the side wall portions positioned on the left and right sides are joined. The said coupling means can be employ | adopted suitably.

For example, when explaining based on the longitudinal front view which shows the schematic structure of the furnace 1 shown in FIG. 9 as a general conventional example, the figure corresponds to the schematic assembly structure of the furnace 1. As shown in FIG. The wall part 2, the side wall part 3 ("3a" represents a left side wall part, "3b" represents a right side wall part), and the bottom wall part 4 all use the circumferential wall 1 which uses each peripheral wall part which forms a flat surface shape. The configuration of the is shown.

In forming the heating chamber 1, in the state where each side end part of the upper wall part 2 and the bottom wall part 4 was superposed | polymerized with the flange parts 5 and 6 formed in the upper and lower end parts of the side wall part 3, For example, a rectangular box-shaped heating chamber 1 is formed, which is joined by a caulking means for pressurizing the polymerized portion, and the front surface is opened by assembling a rear wall portion (not shown).

Moreover, the housing 7 shown by the dashed-dotted line in the figure is provided in the outer periphery of the furnace 1, The said housing 7 has the same rectangular shape, and has a predetermined | prescribed thermal insulation distance with the furnace 1 It forms the outline of the heating cooker through.

However, although the whole circumferential wall part of the heating furnace 1 may be made into the shape of some non-flat surface instead of the flat surface, for example, FIG. 10 is an equivalent figure of FIG. 9 which shows another conventional example as an example.

In the case of cooking using a heating means by hot air, almost the entire upper wall portion of the heater is protruded in an arc shape, and a twisting effect is applied to the hot air after colliding the hot air at various angles toward the inner wall surface of the arc shape. In addition, the uniformity of the hot air in the air is obtained to eliminate the heating unevenness of the superheated material.

Hereinafter, in FIG. 10, the same parts as in FIG. 9 are denoted by the same reference numerals, and the heater 10 is different in that it has an upper wall portion 11 having an arc-shaped cross section when viewed from the front having a non-flat surface shape. It is set as substantially the same structure as FIG.

That is, the upper wall part 11 forms the so-called "semi-cylindrical" circular arc shape which has the circular-arc part 11a which protrudes upward as a whole shape, and the hot air blown in the inside and toward the upper wall part 11 side is a circular arc. It collides with the inner wall surface of the part 11a, and it changes direction and flows, and in principle, it turns and flows along the circular arc surface as shown by arrow A in the figure.

In addition, the hot air is warped in accordance with the flow forward after the change of direction, and the flow eliminates blind spots of the hot air flow and eliminates heating unevenness of the superheated water, thereby obtaining uniform hot air in the inside of the oven to provide efficient heating cooking. To make it possible.

That is, in the upper surface part 2 of the flat surface shape which comprises the general heater 1 as shown in FIG. 9, the hot air after a collision with the flat surface of the upper wall part 2 after changing direction is in principle. As a result, the linear flow as shown by arrow a in the figure is mainly used, and there is a problem in that such hot wind flows cause a square portion, that is, hot air nonuniformity is likely to occur. By providing it, it becomes possible to suppress the heating nonuniformity by hot air.

In this case, however, as the upper wall portion 11 protrudes upward (shown by reference numeral “h1” in the drawing), the housing 12 is heated to be compact in terms of increasing height and unnecessary space. Can't get a cooker

For this reason, in order to cope with the above-mentioned unreasonableness of the enlargement, it is possible to cope with the unreasonableness by reducing the height of the side wall portion 3 by the portion h1 where the upper wall portion 11 protrudes in an arc shape.

However, in such a coping method, the side wall portion 3 is naturally smaller, and the structure of the side wall portion 3 of the heating chamber 1 having the general configuration as shown in Fig. 9 becomes non-common, and the versatility of the component The lack of this makes it impossible to manufacture efficiently, and also causes unreasonableness such as high internal volume.

In addition, in the periphery of the curved surface forming base B in the circular arc portion 11a of the upper wall portion 11, warping due to deformation after molding, distortion caused by springback, and the like are likely to occur. With respect to (5), a gap is likely to occur in the inner circumferential side (curved base B side) of the joined portion.

In this case, when food waste enters or is made of a material (for example, galvanized steel sheet) that needs to be coated after assembling as the heating chamber 10, a coating pool is generated and the appearance of the painting finish in the container Problems such as poor quality.

In addition, the structure which protrudes the upper wall part 11 in circular arc shape upwards is not limited to the said embodiment, For example, one halogen lamp heater is provided in the inner surface side of the upper wall part 11 as a heating heater, or It is also conceivable to employ a plurality of cases, in which case the upper wall portion 11 may be projected upward in an arc shape, and the inner surface side thereof may be a heat reflecting portion. Have

In order to solve the above problem, the present invention assembles the heater using a common circumferential wall component without increasing the size even in a heater configured by employing a non-flat surface circumferential wall portion protruding outward to a part of the inner circumferential wall surface. An object of the present invention is to provide a heat cooker that can be used.

In order to achieve the above object, the heating cooker of the present invention includes a heater having a box shape for opening a front surface thereof.

The heater has a peripheral wall portion that forms a non-flat surface shape projecting outward to a part of the plate-shaped peripheral wall portion to form a box shape, the peripheral wall portion adjacent to both sides of the peripheral wall portion of the non-flat surface shape It is composition to do

Bonding portions are formed at both end portions of the circumferential wall portion of the non-flat surface shape, and flange portions to which the bonding portions are polymerized are formed at the adjacent circumferential wall portions,

The non-flat surface circumferential wall portion is characterized by having a stepped portion bent toward the inner side from the junction portion.

According to the present invention, even in a heating oven having a circumferential wall portion having a non-flat surface protruding outward for improving a heating function, the step is formed by providing a step portion to the circumferential wall and assembled with an adjacent circumferential wall portion. The portion can absorb the projected portion to the outside, prevent the enlargement, maintain the compact structure, and at the same time, each of the plate-shaped circumferential wall portions other than the non-flat surface circumferential portion, It can be shared with the circumferential wall, and it is possible to provide an advantageous heating cooker in terms of cost.

Hereinafter, an embodiment of a heating cooker of the present invention will be described with reference to FIGS. 1 to 7. First, it demonstrates based on the front view which shows the heating cooker of the door open state shown in FIG. 3, and the exploded perspective view of the heater shown in FIG.

As the overall configuration of the heating cooker, as shown in Fig. 3, the inside of the housing 21 having a rectangular shape forming an outline is provided with a heater 22 having a box shape with an open front face. The door 23 which opens and closes the front opening is rotatably provided.

The heater 22 is basically constituted in a box shape by being surrounded by a flat plate-like circumferential wall portion except for the front side, and as the circumferential wall portion, an upper wall portion 22a, a bottom wall portion 22b, a left wall portion 22c, The right side wall portion 22d and the rear wall portion 22e are joined together to form a box shape, and the front plate 25 having the front opening 24 is coupled to the front side thereof.

In addition, each said peripheral wall part can be integrated integrally and can be formed, for example, It is good also as a structure which the left and right side wall part 22c, 22d and the bottom wall part 22b integrally bend | folded and formed in an inverted C shape. In addition, although the detail about the coupling means of each peripheral wall part, the spherical shape of the upper wall part 22a, and the opening 24 is mentioned later, For example, the opening 24 is the upper wall part 22a, the left-right side wall part in this embodiment. It is enclosed by 22c, 22d and the bottom wall part 22b, and it is set as the shape equivalent to the opening formed in the front surface side.

In the present embodiment, a hot air generator 26 as a heating means is provided on the rear side of the rear wall portion 22e of the heater 22 (see FIG. 3). The hot air generating device 26 includes a hot air fan 27, a hot air heater 28 disposed therein, a central air intake hole 29 formed in the rear wall portion 22e serving as some hot air casings, and the surroundings thereof. It is comprised by the blowing hole 30 formed in the several part of the.

Therefore, according to such a hot wind generating device 26, air inside the refrigerator is driven into the hot air casing on the rear side of the rear wall portion 22e by the rotational drive of the hot air fan 27 to the hot air heater 28. The hot air is heated and hot-aired, and the hot air is blown out of the blowhole 30 into the inside of the chamber, and the hot air circulation which enters from the intake hole 29 is repeatedly executed.

However, although not shown, a heating plate 22 is usually provided with a shelf plate on which food is placed, and heating cooking of the food by the hot air circulation, that is, oven cooking is performed. Although not shown as other well-known heating means, a magnetron may be provided so that high frequency may be irradiated toward food in the refrigerator, and a heating means such as heater heating may be provided.

Next, based on the longitudinal front view of the furnace 22 shown in FIG. 1, and the expanded sectional drawing of the principal part shown in FIG. 2, the assembly structure especially in the principal part of the furnace 22 is demonstrated. As described above, the heater 22 basically constitutes a rectangular box surrounded by respective circumferential wall portions having a flat plate shape. However, in the present embodiment, only the upper wall portion 22a of the circumferential wall is a non-flat surface in the present embodiment. It is formed in a shape.

The left and right side wall portions 22c and 22d and the bottom wall portion 22b and the rear wall portion 22e, which are other peripheral walls, also serve as hot air casings as described above. (22) is formed in a box shape.

That is, each circumferential wall portion except the upper wall portion 22a forms a flat surface shape common to the conventional structure, and the left and right side wall portions 22c and 22d are flange portions bent in the side (outward) at the upper and lower ends, and the upper plan is formed. Branch portions 31 and lower flange portions 32 are formed, respectively.

Moreover, the bottom wall part 22b also has a common structure, forms a flat surface shape so that a food can be directly arrange | positioned on a bottom face, and is set to the magnitude | size which superposes | polymerizes with the lower flange part 32 on either side.

On the other hand, as described above, the upper wall portion 22a, which is the circumferential wall portion of the non-flat surface shape, has a configuration in which the arc portion 33 occupies most of the ceiling portion in the furnace as seen from the front, particularly as shown in FIG. have.

Specifically, the right and left side end portions are provided with flat joint portions 34, and the joint portions 34 are sized to correspond to the upper flange portions 31 of the left and right side wall portions 22c and 22d, and will be described later. The part joined by the caulking means is formed. The stepped portion 35 is bent at a right angle from the junction portion 34 and lowered downwardly in the chamber.

In addition, from the lower end of the stepped portion 35, a horizontal flat portion 36 is formed which extends laterally in the refrigerator, and the circular arc portion 33 is moved from the flat portion 36 to the outside of the heating chamber 22. As a result of protruding upwardly, the flat portion 36 is located on the left and right sides of the arc portion 33.

However, the stepped portion 35 is predetermined downward from the junction portion 34 that is the same as the height position of the upper wall portion 2 forming a flat surface shape of a conventional configuration (see contrast with FIG. 9 of the conventional example). The stepped portion (size) corresponds to the height h2 of the stepped portion 35 after passing through the stepped portion.

And as shown in FIG. 1, the circular-arc part 33 made into the protrusion height h1 (h2≥h1) equal to or less than the height h2 of the step part 35 is formed. In the present invention, the protrusion height h1 equal to or less than the height h2 of the stepped part 35 is defined as the protrusion height h1 equal to or less than the height h2 of the stepped part 35 for convenience.

That is, the protruding height h1 is the size of the height direction from the flat portion 36 to the apex of the center of the arc portion 33, and the arc portion 33 is lower than the step portion 35 in this embodiment. (h1 <h2).

In this regard, the arc-shaped peak of the arc portion 33 does not protrude upward from the position of the joining portion 34, that is, the joining portion 34 and the height position are suppressed to the equivalent position or less, which is the arc portion. It is not necessary to make the height of the housing 21 according to the formation of 33 high at all.

Therefore, the heights of the left and right side wall portions 22c and 22d can also be shared without changing from the conventional configuration, and can be used in common with the respective side wall portions 3a and 3b shown in FIG. 9.

Here, the caulking means which combines each main peripheral wall part which comprises the heater 22 is demonstrated. First, based on FIG. 2, about the coupling means of the upper wall part 22a and the left and right side wall parts 22c and 22d located in the right and left side parts, especially about the coupling means by the left wall part 22c side shown. Explain.

The bonding portion 34 of the upper wall portion 22a is polymerized to be disposed on the upper flange portion 31 of the left wall portion 22c, and is bonded and fixed to a plurality of portions by using a caulking means in the polymerization state. Although not specifically shown, the said caulking means pressurizes with a punch in the state which interposed the superposition | polymerization part of the junction part 34 and the upper flange part 31 between a punch and die.

As a result, the polymerized part narrowed by the punch and the die is spread | stretched thinly laterally, and the so-called upsetting process by press molding is performed, Therefore, the state which fixed the two metal plates superposed | polymerized as shown in FIG. To combine.

The upsetting caulking (E) is carried out in a plurality of parts, the joint portion 34 and the upper flange portion 31 is in close contact with each other.

The caulking coupling is also used for coupling the lower flange portion 32 and the bottom wall portion 22b shown in FIG. However, the coupling means is not limited to this method, and various coupling means such as general well-known laxative caulking, spot welding, or condenser multi welding can be adopted.

In addition, when the step portion 35 is further described, it is preferable that the step portion 35 is inserted along the inner surface of the left wall portion 22c and assembled without possible gaps.

In this case, there is an advantage that the positioning of the joint 34 and the upper flange 31 before the caulking engagement can be obtained more accurately. As a matter of course, the right wall portion 22d, which is not shown, is also coupled to the same assembly structure.

Next, in addition to FIG. 2 described above, with reference to FIGS. 4, 5, 6, and 7, the coupling means for the upper wall portion 22a and the front plate 25 having the opening 24 at the front side thereof. Explain. 5A is a cross-sectional view taken along a line C-C shown in FIG. 4, and FIG. 5B shows a state after caulking engagement, while showing a state before caulking engagement. 6 is a perspective view corresponding to FIG. 5A, and FIG. 7 is a cross-sectional view taken along the line D-D shown in FIG. 5A.

As described above, the opposite end portions of the upper wall portion 22a are caulked with the straight and flat joint portion 34 which does not reach the arcuate portion, and the same flat upper flange portion 31. In the front side, it differs greatly by the point which set the arcuate edge part of the circular-arc part 33 with the front plate 25. FIG. And it is difficult to employ the caulking means by the upsetting process of the said arc-shaped part by press molding as mentioned above.

That is, the opening on the front side formed by joining each circumferential wall portion constituting the heater 22 has the flat portion 36 on a part of both sides in the upper wall portion 22a, but is substantially almost all viewed from the front. It consists of an arc shape throughout.

Therefore, the upper part of the opening part 24 of the shape front plate 25 similar to the opening of the said front side is formed in circular arc shape, and the consideration which makes it easy to pass in and out of food under the largest opening area is considered.

Therefore, the part which cokes and engages is formed in the circular arc-shaped end part which is the front end of the upper wall part 22a, and the front plate 25 of the one counterpart side forms the part which cokes and engages along the circular arc shape of the upper part of the opening 24. .

Specifically, as shown in FIG. 5A and FIG. 6, the arc-shaped bent piece 37 by which the cross section was bent in triangular shape is formed in the arc-shaped edge part of the one upper wall part 22a which joins first. The bent piece 37 is formed with a slit 38 so as to be divided into a plurality of parts along a direction extending in an arc shape.

On the other hand, in the front plate 25 of the mating side which engages, the arc-shaped joining piece 39 which bends toward the front side and protrudes diagonally upward along the circular arc shape of the upper part of the opening 24 is formed. The slit 40 is formed also in the said joining piece 39 so that it may divide into several pieces along the direction extended in circular arc shape.

And when joining these, by pressing from the side in the state which inserted the arc-shaped joining piece 39 in the triangular shape of the arc-shaped bending piece 37, both can be coked and joined in the state which joined together firmly (FIG. 5b).

When the caulking is engaged, coking is performed so that the slits 38 and 40 formed in the arc-shaped bent piece 37 and the arc-shaped joining piece 39 do not coincide with each other, as shown in FIG. It is set so that it may superpose | polymerize in the position which shifted previously.

In addition, although description is abbreviate | omitted also in the rear wall part 22e of the heater 22, it is fixed and fixed using the caulking means as mentioned above in the rear end part of another circumferential wall part.

Next, the effect | action of the heating cooker of the said structure is demonstrated.

First, the case of heating cooking will be described. Since the upper wall portion 22a of the heating chamber 22 is formed in an arc shape from the front, the hot air generating device 26 is driven to uniformly cook the oven by hot air. Good heating cooking by heating can be performed.

That is, the hot air blown out from the blowing hole 30 into the inside of the air is supplied into the inside of the inside of the air as the hot air having the directionality swelled in the circumferential direction by the centrifugal action by the hot air fan 26. For example, when the hot air fan 27 rotates in the broken arrow direction in FIG. 3, the hot air from the jet hole 30 is ejected in the direction of arrow A with radial direction as a whole.

Among them, the hot air blown out on the upper wall portion 22a side collides with the inner surface side of the circular arc portion 33 as shown in FIG. 1 and changes its direction, that is, in principle, as shown in FIG. As shown by A, the direction changes along the circular arc surface.

As a result, the hot air is ejected from the rear of the inside of the furnace where the hot air is generated, and flows while generating a warping action as it flows toward the front of the inside of the air, and this flow effectively acts to obtain a uniform hot air effect in the inside of the air. Cooking becomes possible.

On the other hand, when the assembly structure of the heating chamber 22 is demonstrated, since the upper wall part 22a has comprised the circular arc shape which has the circular-arc part 33 which protruded upwards, as much as it corresponds to the height h1 originally, It becomes larger in height direction than the heating chamber 1 (refer FIG. 9) of a conventional structure.

Therefore, in order to cope with this, it is possible to increase the height of the housing or decrease the height of the side wall portion. However, it is not possible to maintain the original compact structure and to make the components such as the housing and the side wall portion become uncommon. To generate a ham.

Therefore, in this embodiment, even in the upper wall part 22a which forms an arc shape, it is set as the structure which does not produce the said irrationality. That is, especially, as shown in FIG. 1, FIG. 2 etc., the step part 35 shown in the height h2 below the junction part 35 is provided, and the protruding height of the arc part 33 within the said height h2 is provided. (h1) is set so that the projected height as much as the height h1 can be absorbed. In other words, the height h2 of the stepped portion 35 is set in accordance with the projected height h1 of the arc portion 33.

In this way, the protrusion height h1 of the arc part 33 is substantially within the height h2 of the stepped part 35 substantially from the upper flange part 31 caulked with the joining part 35 as its starting point. At the same height position, the vertex with the height h1 of the arc portion 33 stays below and does not exceed the height position of the upper flange portion 31.

As a result, the heights of the left and right side wall portions 22c and 22d can correspond to each other without changing the conventional configuration, and the parts as the circumferential wall portion can be shared, and the compact structure can be maintained without increasing the height of the housing 21. .

In addition, since the stepped portion 35 is inserted along the inner side surfaces of the left and right sidewall portions 22c and 22d, positioning of the joined portion 34 on the upper flange portion 31 and polymerization becomes easy, and particularly, the stepped portion As the gap between the part 35 and each side wall part 22c, 22d becomes small, the positioning precision improves, and the improvement of the assembly workability including a caulking operation (upsetting caulking E) can be expected.

In the present embodiment, after the step portion 35 is formed, the lower end portion is bent at a right angle to form a flat portion 36 extending in the horizontal direction, and then the arc portion 33 is moved out of the heating chamber 22. It is set as the structure which protrudes and shape | molded toward the side. Here, deformation distortion by springback or the like is likely to occur near the curved base portion B of the arc portion 33.

However, even if deformation occurs, for example, the deformation is absorbed by the flat portion 36 and does not reach the step portion 35. This can prevent the gap S from occurring or increasing from below between the stepped portion 35 and the inner surfaces of the left and right side wall portions 22c and 22d.

As a result, food dregs can be prevented from entering into the gap S at the time of heating cooking, and when the circumferential wall portion of the heater 22 is made of, for example, a galvanized steel sheet, the heater 22 In the coating finish performed after the assembling configuration), there is a possibility that paint gaps may be generated in the gap S, thereby damaging the appearance, but such unreasonability can be eliminated in advance.

On the other hand, as shown in Figs. 5, 6, 7 and the like, the upper wall portion 22a having an arc shape when viewed from the front together with the front plate 25 which is a mating member to be joined in that the front end portion has an arc shape. Both the bending pieces 37 and the joining piece 39 which form an arc shape are provided, and the caulking coupling | bonding (collectively called "laxative caulking") which pressure-polymerizes is performed.

By the way, when bending this bending piece 37 and the joining piece 39 by press-molding, there exists a possibility that a wrinkle may arise by receiving the distortion action of a compression direction around the bending part along the said circular arc shape.

In the present embodiment, since the plurality of slits 38 and 40 are provided in advance in the arc-shaped bending piece 37 and the joining piece 39 along the arc shape and in the direction of dividing the arc shape, they are bent along the arc shape. The distortion effect at the time of press molding can be absorbed by the slits 38 and 40, respectively.

Therefore, the occurrence of wrinkles around the bent portion can be prevented, and unreasonable stress is not applied, so deformation occurs in the overall shape such as the triangular shape of the bent piece 37 and the inclined shape of the joining piece 39. Don't let that happen. In addition, polymerization in the case of coking bonding can also be performed correctly, and sufficient bonding force can be obtained.

However, when the slit 38, 40 is pressed at the same position in the caulking coupling, a trace corresponding to the contour of the slit 38, 40 appears on the front side of the front plate 25 and damage the appearance.

Therefore, in the present embodiment, each of the slits 38 and 40 is previously formed under misaligned positions so as to be inconsistent. However, at least, the slits 38 and 40 may be set so as not to coincide when they are polymerized for coking engagement.

As explained above, according to the said embodiment, it has the following effects.

In the said embodiment, it is set as the structure which protruded the circular arc part 33 which comprises the non-flat surface circular arc shape in the upper wall part 22 which is one of the circumferential wall parts which comprise the heating chamber 22 upward.

Originally, the housing 21 is enlarged in the height direction by a portion (corresponding to the height h1 in FIG. 1) protruding upwards, or the left and right side wall portions 22c, without changing the size of the housing 21. Although the height of 22d) can be reduced, all of them become component parts limited to the embodiment, and the parts can be shared for a heating cooker (see Fig. 9) having an upper wall portion 2 forming a general flat surface. In addition, there are concerns about irrationality such as increase in manufacturing costs due to complicated parts management and workability.

However, according to the present embodiment, the step portion 35 formed on the upper wall portion 22a is cleverly eliminated from increasing in size upward. That is, as shown in FIG. 1, FIG. 2 etc., especially, the step part 35 bend | folded downward and represented by the height h2 from the junction part 35 which is a height position substantially equivalent to a conventional structure is provided, and this height h2 The protruding height h1 of the arc part 33 is set within the time period.

This does not exceed the height position of the upper flange portion 31 whose protruding height h1 of the arc portion 33 is at substantially the same height position as the joint portion 35, that is, the height of the left and right side wall portions 22c and 22d. It can be stored at or equal to or less than that, and the above irrationality can be eliminated, so that the circumferential wall parts except for the upper wall portion 22a can be commonized, and the advantage is largely advantageous in reducing the manufacturing cost.

In addition, in the present embodiment, the upper wall portion 22a having a circular arc shape of "semi-cylindrical shape" is provided, and a twisting effect is applied to hot air that has collided with the inner surface of the arc portion 33 during oven cooking by hot air. It explained that it worked effectively in obtaining the uniform hot air effect in a inside, and can expect the heat cooking which is efficient without a heating nonuniformity.

However, the present invention is not limited thereto, and for example, the inner surface of the arc portion 33 is processed as a heat reflection surface, and a halogen lamp heater or the like is attached thereto to provide a heating cooker capable of improving heating efficiency by radiant heat of the heater. You may do so.

In addition, since the stepped portion 35 is inserted along the inner surfaces of the left and right side wall portions 22c and 22d, the stepped portion 35 functions as a guide, and facilitates the alignment of the bonded portion 34 on the upper flange portion 31 to polymerize. Let's do it.

In particular, the smaller the gap between the stepped portion 35 and the side wall portions 22c and 22d, the more the accuracy of the alignment is expected, and the improvement of the assembly workability including the caulking operation can be expected, but at least the stepped portion 35 ) And the side wall parts 22c and 22d may be parallel.

In addition, in the present embodiment, the lower end of the step portion 35 is bent at right angles to form a flat portion 36 extending in the horizontal direction, and the arc portion 33 is subsequently protruded, but the curved surface is formed. In the vicinity of the base B, deformation distortion due to restoring deformation due to springback or stress concentration is likely to occur.

However, even when such distortion deformation occurs, the deformation is sufficiently absorbed in the flat portion 36 and does not reach the step portion 35.

Therefore, the gap S is prevented from occurring or becomes larger at the lower end side between the stepped part 35 and the inner side surfaces of the left and right side wall parts 22c and 22d, and the food waste at the time of heating cooking in the gap S is prevented. You can prevent it from entering.

In addition, when painting and finishing the circumferential wall part of the heating furnace 22, paint sticking which is easy to generate | occur | produce in the clearance gap S can be prevented and it does not damage the external appearance of the inside of a furnace.

On the other hand, as shown in FIG. 5, FIG. 6, FIG. 7 and the like, the upper wall portion 22a having an arc shape has a front plate 25 which is a mating member for coking engagement in that the front end portion different from the arc direction forms an arc shape. In addition, it is necessary to provide the bending piece 37 and the joining piece 39 which are all arc-shaped.

However, when bending these bending piece 37 and the joining piece 39 along circular arc shape by press molding, since there exists a possibility that a wrinkle may be received by the distortion action of a compression direction around the said bend part, in this embodiment, A plurality of slits 38 and 40 were provided in advance in the direction of dividing with respect to the direction extending in the shape of an arc, and then bent into an arc shape by press molding.

As a result, the distortion caused during press molding can be absorbed by the slits 38 and 40, respectively, and the occurrence of wrinkles around the bent portion can be prevented, and excessive stress is not applied, so that the bending piece 37 Does not cause deformation in the triangular shape, the inclined shape of the joining piece 39, or the like. Therefore, the polymerization in the case of caulking bonding can also be performed correctly, and sufficient bonding force can be obtained.

However, when the slit 38 and 40 are pressed at the same position and coking is performed, traces corresponding to the contours of the slits 38 and 40 are generated on the front side of the front plate 25 to damage the appearance. Let's go.

Therefore, in the present embodiment, since the slits 38 and 40 are previously formed under misaligned positions and at least in the case where they are polymerized for at least coking engagement, the traces are formed in front of the front plate 25. It does not occur and does not damage the appearance.

8A and 8B are diagrams corresponding to FIG. 2 showing different modifications of the present invention. The same reference numerals are attached to the same parts as the above embodiments, and explanations are omitted, and different points will be described.

First, the modification shown in FIG. 8A differs from the fact that the flat portion 36 in the above embodiment is not provided, and otherwise, the configuration is substantially common.

That is, the upper wall portion 22a constituting the non-planar surface has a configuration in which the arc portion 41 protrudes directly from the lower end portion of the step portion 35, and thus the arc portion 41 has a slightly arcuate width with respect to the above embodiment. There is a difference in the magnitude of the size (left and right directions).

According to this configuration, the relationship between the height to the apex of the arc portion 41 (not shown but corresponding to the projecting height h1 of the above embodiment) and the height h2 of the step portion 35 is common to the above embodiment. The protruding height of the arc portion 41 can be set equal to or less than the height of the left and right side wall portions 22c and 22d, and the parts are common except for the upper wall portion 22a in the same manner as in the above embodiment. can do.

However, in this modified example, since the flat portion 36 is not provided, the deformation action such as spring back in the vicinity of the curved base B of the arc portion 41 directly affects the stepped portion 35, and the gap is provided. It is slightly disadvantageous in that it may generate (S).

On the other hand, in the other modified example shown in Fig. 8B, the coupling means between the upper wall portion 22a and the left and right side wall portions 22c and 22d (only the left wall portion 22c is shown) is different from the above embodiment. It is practically a common configuration.

That is, the coupling between the upper wall portion 22a and the left wall portion 22c is such that the joining portion 34 and the upper flange portion 31 are simply polymerized and arranged, while the stepped portion 35 and the left wall portion 22c are supported. For example, it is set as the structure which fastened and couple | bonded with the screw 42 (it may be a bolt nut) in multiple parts.

According to the above configuration, the fastening by the screw 42 using the stepped portion 35, as described above, engages in the vicinity of the portion where the gap S is likely to occur, thereby reliably preventing the occurrence or expansion of the gap S. It is excellent in the point which can be achieved, and it is the assembly structure which was able to obtain the coupling | bonding of the so-called upper wall part 22a and the left wall part 22c, and prevention of generation | occurrence | production of the clearance gap S simultaneously.

However, in the same manner as in the above embodiment, the joining part 34 and the upper flange part 31 are mainly engaged, and the engagement by the screw 42 is a secondary coupling means to cope with the gap S. It is good also as a structure which reduces a part. In addition, other coupling means such as caulking and welding may be used instead of the screw 42.

The present invention is not limited to the embodiments described above and shown in the drawings. For example, the upper wall portion of the circumferential wall portion constituting the heating furnace has a non-flat surface shape. For example, the side wall portion may have a non-flat surface shape instead. In addition, the same effect can be expected, such as suppressing protruding to the side to achieve common parts, and not limited to an arc portion as a non-flat surface shape. Do.

In addition, the shape and size of the specific slit may be appropriately set according to the shape of the arc shape requiring the slit, and the like may be variously modified within the scope not departing from the gist of the present invention.

1 is a vertical front view showing a schematic configuration showing one embodiment of a heating furnace used in the heating cooker of the present invention,

2 is an enlarged cross-sectional view of a main part;

3 is a front view showing the heating cooker in the open state,

4 is an exploded perspective view of the heating furnace,

5A is a cross-sectional view before caulking shown by cutting along the line C-C shown in FIG. 4;

Figure 5b is a cross-sectional view after caulking shown along the line C-C shown in Figure 4,

6 is a perspective view of an essential part corresponding to FIG. 5A;

7 is a cross-sectional view taken along the line D-D shown in FIG. 5A;

8A and 8B are diagrams corresponding to Fig. 2 showing different modifications, respectively.

9 is a diagram corresponding to FIG. 1 showing a conventional example, and

Fig. 10 is a diagram corresponding to Fig. 1 showing another conventional example.

* Explanation of symbols for the main parts of the drawings

21: housing 22: heating

22a: upper wall portion 22b: bottom wall portion

22c: left wall portion 22d: right wall portion

22e: rear wall 24: opening

25: Front plate 26: hot air generator

31: upper flange portion 33, 41: arc portion

34: junction 35: stepped portion

36: flat part 37: arc-shaped bent piece

38, 40: Slit 39: Circular arc-shaped joining piece

42: screw

Claims (6)

In the thing provided with the box-shaped heater which opens the front surface, The heater has a circumferential wall portion that forms a non-flat surface shape protruding outwardly, in part of forming a box shape by combining the plate-shaped circumferential wall portion, and the circumferential wall portions adjacent to both sides of the circumferential wall portion of the non-flat surface shape. With the composition to combine, Bonding portions are formed at both end portions of the circumferential wall portion of the non-flat surface shape, and flange portions to which the bonding portions are polymerized are formed at the adjacent circumferential wall portions, The non-planar circumferential wall portion is provided with a stepped portion that is bent toward the inner side from the joining portion. The method of claim 1, A heating cooker characterized in that the height of protruding outward in a non-flat surface shape of the peripheral wall portion is equal to or less than the height of the adjacent peripheral wall portion. The method according to claim 1 or 2, The non-flat surface circumferential wall portion includes a flat portion bent at a right angle with respect to the stepped portion, and is configured by a non-flat surface shape protruding to the outside of the heater except for the flat portion. The method according to claim 1 or 2, And a stepped portion of the non-flat surface circumferential wall portion is fixedly coupled to an inner side surface of the adjacent circumferential wall portion. The method according to claim 1 or 2, The circumferential wall portion of the non-flat surface shape is formed to protrude in an arc shape, and at an end portion different from the arc direction of the circumferential wall portion, a cross section for engaging a front plate having a front opening is provided with a triangular arc-shaped bent piece. And a slit divided into a plurality of bent pieces along the arc-shaped direction. The method of claim 5, The front plate includes an arc-shaped joining piece for polymerizing and coking with a bent piece along an arc shape, and the arc-shaped joining piece is provided with a slit which is divided into a plurality of portions along an arc-shaped direction. A heating cooker characterized in that the polymerization is bonded to the position deviated from the slit on the side of the bent piece.

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